Merge branch 'release/planningsheet' into develop

* release/planningsheet:
  bumped version number
Merge branch 'master' into develop

* master:
  renamed
  added drone db yml
  improved styling of pdfs
  updated rails
  refactored
  added filter functionality to printing
  and now in the right order
  sort by date number seems shitty
  split up latin and std
  fixed couples bug
  fixed method
  fixed bug
  hups
  fixed typo
  removed refactoring
  updated gems
  added provisioning a bit more, but rbenv wont work :(
  fixed design issue
  fixed several bugs
  fixed two typos
fixed